there are a ton of factors that go into value...
Is it game used...of so what year/model?
Is it game "issued" (Never actually used in game)?
Is it a generic capitals wood stick thats signed?
Does it have tape on the blade and handle or no tape at all etc.
I have a number of Ovie pieces and if its a game used stick that signed with COA I have seen them go over 1k. If it just a signed generic stick then somewhere in the $150-200 range would be my guess. Nice gift